He used his wealth to improve his empire.

He gave his people wealth, food, and more.

To improve the company's performance in other to maximize shareholders wealth

Andrew Carnegie alludes to the extreme wealth inequality of the Gilded Age in "The Gospel of Wealth." He argues that the wealthy have a moral obligation to use their wealth to benefit society, suggesting that they should engage in philanthropy to address social issues and improve the welfare of the less fortunate.

The major tenet of the Gospel of Wealth, as advocated by Andrew Carnegie, was the belief that wealthy individuals had a moral obligation to use their wealth to benefit society. Carnegie argued that the rich should practice philanthropy and invest in projects that would help improve the well-being of the less fortunate. He believed in the idea of "surplus wealth" being redistributed for the greater good.